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Analog Devices Inc./Maxim Integrated MAX6328XR26+T
- Part No.:
- MAX6328XR26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6328XR26+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,581
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Product details
Overview
MAX6328XR26+T from Maxim Integrated is an ultra-low-power, open-drain, active-low microprocessor supervisory circuit in SC70-3 package. It monitors VCC supply voltage and asserts reset when VCC falls below 2.63V (±2.5% over temperature), maintaining reset for ≥100ms after VCC recovers. Designed for 2.5V/3V/3.3V/5V systems, it draws ≤1µA supply current and operates from -40°C to +85°C.
For engineers reviewing the MAX6328XR26+T datasheet, MAX6328XR26+T pinout, MAX6328XR26+T application, or MAX6328XR26+T equivalent, this page delivers verified electrical behavior, thermal stability, transient immunity, reset timeout accuracy, and direct compatibility with bidirectional µP reset pins - critical for portable, battery-powered, and industrial embedded designs.
Technical Context
The MAX6328XR26+T implements a precision bandgap-based reset comparator with factory-trimmed 2.63V threshold (±1.5% at +25°C, ±2.5% over full temperature range) and 6.3mV hysteresis. Its open-drain RESET output requires an external pull-up and supports bidirectional reset interfacing, such as with Motorola 68HC11 µPs.
It features immunity to fast VCC transients (up to 100V/µs slew rate), guaranteed correct state down to 1V VCC, and a power-on reset timeout of 100–280ms. The device ignores negative-going glitches shorter than values defined by the Maximum Transient Duration vs. Reset Threshold Overdrive curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (±2.5% from -40°C to +85°C); ensures reliable brownout detection for 2.5V–3.3V logic rails |
| Supply Current | ≤1.0µA at +25°C; enables multi-year battery life in portable equipment |
| Reset Timeout | 100ms minimum power-up delay; guarantees µP initialization completes before release |
| Output Type | Open-drain active-low RESET; allows wired-OR configuration and bidirectional µP interface with single pull-up |
| VCC Operating Range | 1.2V to 5.5V; supports operation during deep brownout and across multiple supply domains |
| Temperature Range | -40°C to +85°C; qualified for industrial and extended commercial environments |
| Reset Hysteresis | 6.3mV; prevents oscillation near threshold during slow VCC recovery |
Pinout & Package
MAX6328XR26+T is housed in a 3-pin SC70-3 package (outline X3-2), footprint-compatible with SOT23-3 but with smaller body dimensions (2.0mm × 1.25mm × 0.9mm). Pin 1 = GND, Pin 2 = RESET (open-drain), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance return path |
| 2 | RESET | Open-drain active-low output; sinks up to 1.6mA at 0.3V; requires external pull-up for logic-high state |
| 3 | VCC | Power supply input; powers internal circuitry and defines reset threshold reference; rated -0.3V to +6V absolute max |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max ensures minimal battery drain in always-on monitoring applications |
| Factory-trimmed VTH | 2.63V threshold set at wafer level with ±1.5% room-temp tolerance; eliminates external calibration |
| VCC transient immunity | Rejects glitches <100µs wide (depending on overdrive), preventing false resets during noisy power events |
| No external components | Self-contained reset generation-no capacitors, resistors, or trimming required for basic operation |
| Bidirectional reset support | Open-drain output enables shared reset bus where either µP or supervisor can assert reset |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG monitor powered by coin-cell battery with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset during VCC sag caused by RF transmission burst or sensor activation. Use Value: 1µA quiescent current extends battery life beyond 3 years; 2.63V threshold aligns precisely with 3.0V LiMnO₂ discharge knee. |
Use Scenario: DIN-rail mounted analog input module operating in factory ambient (-25°C to +70°C). IC Role / Device Role / Timing Role: Power-on reset generator ensuring ADC and FPGA initialize synchronously after 24VDC supply stabilizes. Use Value: Guaranteed 100ms minimum reset pulse ensures full FPGA configuration load; ±2.5% VTH tolerance maintains reliability across temperature extremes. |
| Smart Meter Communication Units | Automotive Body Control Modules (Non-safety) |
Use Scenario: NB-IoT cellular modem section in electricity meter, cycling between sleep and transmit modes. IC Role / Device Role / Timing Role: Brownout detector preventing corrupted firmware execution during 3.3V rail collapse under GSM burst load. Use Value: Open-drain RESET interfaces directly with modem's bidirectional reset pin using single 10kΩ pull-up; no level-shifter needed. |
Use Scenario: Interior lighting controller powered from vehicle battery (9V–16V), regulated to 3.3V via LDO. IC Role / Device Role / Timing Role: Secondary reset supervisor verifying regulated 3.3V rail integrity before enabling CAN transceiver and LED drivers. Use Value: Immunity to 100V/µs VCC transients suppresses false resets during load-dump events; SC70 package saves PCB area in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR26+T | Push-pull active-low RESET output; higher VOL (0.3V @ 1.6mA) vs. open-drain leakage-limited low-state | Requires no external pull-up; unsuitable for wired-OR or bidirectional reset buses | Select when driving single-load RESET inputs without shared bus requirements |
| TPS3808G125DBVR | Fixed 1.25V reset threshold; 2.5µA typical ICC; push-pull output; 200ms default timeout | Not pin-compatible; lacks open-drain flexibility; designed for low-voltage ASICs rather than 3.3V µPs | Choose only if system uses 1.25V rail monitoring and board layout permits rework |
Compared with MAX6326XR26+T, the MAX6328XR26+T enables shared reset busing and bidirectional control, while TPS3808G125DBVR offers tighter low-VCC accuracy but sacrifices interface flexibility and threshold match for 3.3V systems.
Availability
MAX6328XR26+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication units, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6328XR26+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX632x family was engineered specifically for ultra-low-power, precision voltage monitoring in battery-critical and thermally demanding embedded systems - delivering guaranteed reset timing, minimal supply current, and robust transient rejection without external components.
FAQ
What is the exact reset threshold voltage of MAX6328XR26+T and how does it vary with temperature?
The MAX6328XR26+T has a nominal reset threshold of 2.63V at +25°C, with factory trim tolerance of ±1.5%. Over the full operating temperature range (-40°C to +85°C), the threshold varies by ±2.5%, resulting in a guaranteed range of 2.564V to 2.696V. Its tempco is 40ppm/°C, contributing to predictable drift across thermal conditions.
Does MAX6328XR26+T require an external pull-up resistor on its RESET pin?
Yes, MAX6328XR26+T features an open-drain RESET output and requires an external pull-up resistor to establish a logic-high state when not asserted. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements. No pull-up is needed for the MAX6326/MAX6346 push-pull variants.
Can MAX6328XR26+T operate reliably below 2.5V VCC?
Yes, MAX6328XR26+T is fully specified down to 1.2V VCC over temperature and guaranteed functional down to 1.0V. Its internal circuitry remains in a known state, and the reset comparator continues accurate monitoring - making it suitable for deep-brownout detection in low-voltage systems.
Is MAX6328XR26+T pin-compatible with older Maxim reset supervisors like MAX809?
Yes, MAX6328XR26+T is pin-compatible with MAX809, MAX803, and MAX810 in SC70-3 and SOT23-3 packages. It shares identical pinout (GND, RESET, VCC), same footprint, and compatible voltage ratings - enabling drop-in replacement where open-drain output and 2.63V threshold meet design needs.
What is the maximum VCC slew rate that MAX6328XR26+T can tolerate without generating spurious resets?
MAX6328XR26+T is rated for a maximum VCC slew rate of 100V/µs per Absolute Maximum Ratings. Its internal comparator architecture and hysteresis (6.3mV) reject fast transients, and the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Threshold Overdrive" quantifies immunity - e.g., a 100mV overdrive allows transients up to ~150µs without triggering reset.
MAX6328XR26+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6328XR26+T FAQ
1.How can I place an order for MAX6328XR26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6328XR26+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6328XR26+T reliable?
The price and inventory of MAX6328XR26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6328XR26+T is usually 5 days.
3.What payment methods are accepted for MAX6328XR26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6328XR26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6328XR26+T?
MAX6328XR26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6328XR26+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6328XR26+T?
For technical support, including MAX6328XR26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6328XR26+T requirements.
6.How does Aetrix verify that MAX6328XR26+T is sourced from the original manufacturer or authorized distributors?
All MAX6328XR26+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6328XR26+T meets industry standards.
7.What is the process for return or replacement of MAX6328XR26+T?
All MAX6328XR26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6328XR26+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6328XR26+T part is unused and in its original packaging.
Return procedure for MAX6328XR26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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